Python IRC library

This release adds SSL and IPv6 support.

Infinitely recursive calls when disconnecting with
a failed connection were fixed.
ServerConnection.disconnect was made more
consistent and some functions were changed to use
it instead of quit. Quit arguments were fixed to
return a list rather than a list of a list. Other
minor fixes were made.

The library now raises an exception (ServerNotConnectedError) when the
client tries to send a message to a disconnected server.

Nicknames received in welcome messages are now stored to track nickname changes initiated by a nicknameinuse callback.

Support has been added for DCC. The USER command is sent according to RFC 2812. Distutils support has been added. This release will ignore empty lines from the server. ServerConnection.remove_global_handler has been added. CTCP VERSION replies are prepended with VERSION.